1407947561 has 2 divisors, whose sum is σ = 1407947562. Its totient is φ = 1407947560.

The previous prime is 1407947551. The next prime is 1407947573. The reversal of 1407947561 is 1657497041.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1235944336 + 172003225 = 35156^2 + 13115^2 .

It is an emirp because it is prime and its reverse (1657497041) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1407947561 is a prime.

It is not a weakly prime, because it can be changed into another prime (1407947551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 703973780 + 703973781.

It is an arithmetic number, because the mean of its divisors is an integer number (703973781).

Almost surely, 2^1407947561 is an apocalyptic number.

It is an amenable number.

1407947561 is a deficient number, since it is larger than the sum of its proper divisors (1).

1407947561 is an equidigital number, since it uses as much as digits as its factorization.

1407947561 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 211680, while the sum is 44.

The square root of 1407947561 is about 37522.6273200585. The cubic root of 1407947561 is about 1120.8018176822.

The spelling of 1407947561 in words is "one billion, four hundred seven million, nine hundred forty-seven thousand, five hundred sixty-one".